What's the difference between a walking pad and a full treadmill?

Walking pads are low, compact, and slide under a desk or bed, with narrow belts and modest top speeds suited to walking. Full treadmills have wider, longer decks, stronger motors, higher top speeds, and steeper incline ranges for running. Reviewers note walking pads can struggle to fit tall users with long strides, while full treadmills take up far more floor space.